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tracing: define TRACE_DEFINE_SIZEOF() macro to map sizeof's to their values

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Perf has a problem that if sizeof() macros are used within TRACE_EVENT()
macro's they end up in userspace as "sizeof(kernel structure)" which
cannot properly be parsed. Add a macro which can forward this data
through the eval_map for userspace utilization.

Link: http://lkml.kernel.org/r/20170531215653.3240-10-jeremy.linton@arm.com

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Jeremy Linton 2017-05-31 16:56:50 -05:00 • committed by Steven Rostedt (VMware)
parent 67ec0d8595
commit 4f0dfd76e9
2 changed files with 17 additions and 0 deletions
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1
include/linux/tracepoint.h
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@ -88,6 +88,7 @@ extern void syscall_unregfunc(void);
#define PARAMS(args...) args
#define TRACE_DEFINE_ENUM(x)
#define TRACE_DEFINE_SIZEOF(x)
#endif /* _LINUX_TRACEPOINT_H */